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Zootaxa, Cladistic Analysis of Thoreyella and Related Genera

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Zootaxa, Cladistic Analysis of Thoreyella and Related Genera Zootaxa 2310: 1–23 (2009) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2009 · Magnolia Press ISSN 1175-5334 (online edition) Cladistic analysis of Thoreyella and related genera (Hemiptera: Pentatomidae: Pentatominae: Procleticini) JORGE L. C. BERNARDES, CRISTIANO F. SCHWERTNER*, & JOCÉLIA GRAZIA Laboratório de Entomologia Sistemática, Departamento de Zoologia, Programa de Pós-Graduação em Biologia Animal, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Bloco IV, prédio 43435, 91501-970 Porto Alegre, RS, Brazil. [email protected]; [email protected] *Departamento de Ciências Biológicas, Universidade Federal de São Paulo, Campus Diadema, Rua Prof. Artur Riedel 275, Diadema, SP, Brazil. [email protected] Abstract In this paper, the monophyly of the genus Thoreyella Spinola was tested, and a hypothesis of relationships among its species is proposed. Four known species of Thoreyella and two new species, as well as species of three other genera of Procleticini (Neoderoploa Pennington, Lobepomis Berg, and Procleticus Berg), were treated as the ingroup. The new species of Thoreyella will be published elsewhere. Two species of Dendrocoris were used for outgroup comparison. A cladistic analysis of 38 morphological characters supported a hypothesis of common ancestry for Thoreyella and the three genera of Procleticini included in the ingroup. The results also showed Thoreyella as a monophyletic taxon, and its sister group relationship with the monophyletic group including Neoderoploa, Lobepomis, and Procleticus. The geographical distribution of these taxa is discussed. Key words: Cladistic analysis, Thoreyella, Procleticini, biogeography, Neotropics Introduction The tribe Procleticini includes 11 genera and 33 species distributed in the Neotropical and Nearctic regions. Procleticini was established by Pennington (1920) for the monotypical genera Procleticus Berg, Lobepomis Berg, Neoderoploa Pennington, and Terania Pirán. Rider (1994) described Paraodmalea (1 sp.), and transferred to Procleticini the genera Aleixus McDonald (1 sp.), Brepholoxa Van Duzee (2 spp.), Dendrocoris Bergroth (14 spp.), Odmalea Bergroth (6 spp.), Zorcadium Bergroth [=Pseudobebaeus Fallou] (1 sp.), and Thoreyella Spinola (4 spp.). Rider (1994) defined the unique characteristics of Procleticini that support the monophyly of the tribe: 1) female genital plates small and recessed into venter; 2) laterotergites 8 lacking spiracles; 3) gonocoxites 8 often partially or completely obscured by the last abdominal sternite; 4) gonocoxites 9 often emarginated; 5) laterotergites 9 subtriangular; 6) segment X of female relatively large; 7) pygophore somewhat produced posteriorly with distinct medial emargination which may be either narrow and parallel-sided or often becoming circular ventrally; and 8) pygophore usually with small emargination between lateral margins and superior ridge. Rolston (1978) considered Thoreyella related to Odmalea, Dendrocoris, and Brepholoxa by the following characters: abdominal ventral spine present, bucculae lobate posteriorly, and segment I of rostrum inside bucculae. Rolston (1984) revised Thoreyella, and included it in a group of seven American genera, all of them with a ventral spine or tubercle anteriorly-projected at the base of the abdomen: Aleixus, Brepholoxa, Dendrocoris, Odmalea, Rio Kirkaldy, 1909, Pseudobebaeus, and Thoreyella. Rolston (1984) distinguished Thoreyella from Odmalea by several characters: juga contiguous distally, ostiolar rugae slightly curved, coria costal angle reaching little or not at all beyond scutellum, and frena just surpassing basal third of scutellum are Accepted by C. Schaefer: 18 Nov. 2009; published: 14 Dec. 2009 1.
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